A unique botanical garden housed in three giant geodesic domes.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

Washington's iconic carousel has a nice piece of Civil Rights history.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The most accurate timepiece in the world.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

Outsider art meets paleontology at this roadside reptile repository.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

Thousands of tiny squares in different colors make up this piece of street art.

Thousands of jack o'lanterns light up Halloween at this historic West Virginia home.

Remnants of a storybook amusement park hidden behind a strip mall.

These five Art Deco homes were meant to solve the "small house problem."

This hidden treasure provides a charming access point along the south side of Baker Park.

Rumors persist that a bottle of whiskey is sealed within this Demijohn-shaped adornment.

Once the center of a thriving early Black community called Martinsburg.

This general store has stood in the same spot for well over a century.

Built in 1945, this historic train station has a new lease on life with its baggage area serving as an event space.

This suburban park recalls the history of a famous tavern. Despite the name, it's no ordinary place!

A massive white oak tree provides a beautiful canopy near a suburban shopping center and stood before the signing of the Constitution.

This bell is one of the last remnants of the lost city of Triadelphia.